Date: Thu, 28 Jun 2007 16:40:38 GMT
From: "mdb" <>
Subject: Re: strange noise in dash when turning

Thanks for the suggestion about the evaporator drain. I'll check it out. As for the temp sensor, I knew it was working but wasn't sure if the bearing in that unit might be the source of the noise. I stopped the little fan and did a few hard turns to see if the noise stopped. It didn't. I assume the drain problem will continue to worsen until it's unblocked so will get to that asap. "bozo" <> wrote in message news:1lFgi.2616$YS.1539nospamdc03... > It is likely a plugged evaporator housing drain - the trapped water > sloshes on turns and can 'bother' the fan - which makes the noise and can > eventually over-stress the fan, too. A good site is quasimotors saab 9000 > site - in the faq section, there's a part about the ac evap drain with a > pic of the drain outlet (of course it is under the car) - site is: > - go to the faq section and then the ac evap drain section > and click on the pic link to see the outlet > > ALSO - you don't need to stick anything in the opening of the cabin temp > sensor to see if it is running (could be costly for you to do that) - just > take a smallish section of single ply toilet or kleenex type tissue and > rest it against the cabin sensor grille - the fan sucks in so if it is > working, it will hold the tissue in place. Over time, the little temp > sensor bulb in there can acquire a "helmet" of crud and that can affect > sensor accuracy - that can be resolved with a spritz of compressed air > from a photo/computer type air-blast cleaner can > > Rick > > > "Steve B." <> wrote in message > news:2un583h5p0ge7n9ccac46b1dl3pd815lf3nospamcom... >> On Wed, 27 Jun 2007 20:35:26 GMT, "mdb" <> wrote: >> >>>I have a 97 9000 Aero and have recently noticed a new noise. I'm >>>wondering >>>if it might be indicative of a low level of freon in the ac system. It >>>happens when I turn hard, to the right or left, while the car is >>>moving. >>>There is a squeaking, whooshing sound. Almost like liquid shifting from >>>one >>>side to another. I suspected the cabin temp sensor so removed that last >>>weekend and cleaned it. As a further test, I stuck a small shaft into the >>>cabin temp sensor to stop that fan. Still got the noise when turning the >>>car. Less noticeable on gentler turns. No strange sounds at all when >>>driving >>>straight ahead or hard stopping. >>> >>>Any ideas what I might be hearing. >>> >>>Thanks. >>> >>>Michael >>> >> >> The refrigerant in the a/c system won't make noise when you turn >> corners. It is a gas under pressure and doesn't really move around >> because of turning forces. >> >> You might be close to the culprit though.. Sometimes the condensate >> drain for the a/c system clogs up and the plenum starts to fill with >> water. I had an old Cadi that would dump about a gallon of ice water >> on your feet during a turn when it clogged. After a couple of times >> of this happening I learned to keep that drain clear! >> >> I don't know exactly where the drain is on your hose but it should be >> coming out the passenger side firewall area. >> >> Steve B. > >

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